Not that I've had any time to do them, but I have often written up entire business plans just based off of profiting from something that makes me angry. For ex

Not that I've had any time to do them, but I have often written up entire business plans just based off of profiting from something that makes me angry. For example, when I had a contract programming business 10 years ago I absolutely despised the RFP process. I still have a business plan sitting around built entirely around that flow. I still hate the RFP process, but I figured if this thing is going to still be a thing I may as well make money off of it. If I ever had free time to just sit and build stuff day after day you'd end up with this entire incoherent set of businesses based on things that I couldn't stand. :)